Centrifugal pumping apparatus.



W. KIESER.

CEN'BRIFUGAL PUMPING APPARATUS.

APPLIOATIQN FILED SEPTQ, 1909.

a M d m J o 6 N 4 5 s H, M'VHIMIIIrIIIIIIrII/L F O O 7 Inventor; Walter- Kisser; W

a ttl Witnesses uurrap STATES PATENT OFFICE.

WALTER KIESER, F BERLIN, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY,

A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed September 2, 1909. Serial No. 515,904.

Germany, have invented certain new and useful Improvements in Centrifugal Pumping vApparatus, of which the following is a v specification.

This invention relates to centrifugal pumping apparatus and more particularly to such apparatus for removing the water of condensation and the air, water-vapor and uncondensed gases from condensersl The object of the invention is the provision of an etticient combined water and air pump of improved construction that is compact, readily balanced as to pressures tending to cause axialmovement of the impellers, easily packed against leakage, and that requires fewer stutling boxes than are necessary when separate pumps are used for performing the same service.

For convenience, in the description which follows the pump which removes the Water of condensation will be designated as the water pump' and the pump which removes the air, water-vapor and uncondensed gases will be referred to as the air pump.

- In the accompanying drawing illustrating one of the embodiments of the invention, Figure 1 is a section of a combined Water and air pump on the line 1-1 of Fig. 2; and Fig. 2 is a side view of the pump.

The impeller 3 of the water pump and the impeller 4 of the air pump are mounted in spaced relation on a shaft 5 that is driven by any suitable motor. Theair pump is of the throwing type. Vater is supplied to the inlet ends of the passages 6 in the impeller 4 by an axially arranged conduit 7. This water is thrown outward by centrifugal action into a series of passages 8 in a guiding or directing ring or member surrounding the periphery of the impeller. The watcr flows through the passages 8 as a series of liquid pistons between which the air, vapor, etc., from the chamber 9 are entrained. The throwing water and the air are discharged into an annular chamber 10 that conveys them toward a delivery outlet 11.

The inlet conduit 12 at the upper part of the pump casing is connected to the condenser and receives the water of condensation, air, water-vapor, etc., therefrom. The

water of condensation flows along the lower portion of the conduit into a passage 13 leading to a chamber 14 at the center of the pump. From the chamber 14 said water flows into the passages 15 of the impeller 3 and is discharged therefrom into the chamber 16 from which it flows away through a nozzle or nozzles 17. A dam or wall 18 in the lower part of the conduit 12 prevents the Water of condensation from flowing over into the chamber 9 where it would interfere with the operation of the air pump. The air, water-vapor, etc., pass along the upper portion of the conduit 12 and through the passage between the dam 18 and the wall of the conduit at the right thereof, Fig. 1, downward into the chamber 9 from which they are drawn into the gap between the impeller t and its surrounding guide ring by the action of the throwing water.

Since the air and water from the conduit 12 are supplied to their respectivev pumps from the chambers 9 and 14 near the middle of the apparatus at the same pressure, the absence of a pressure difference renders a special packing between the two pumps superfluous. The stufiing box 19 for the portion of the shaft 5 that projects outward through the casin of the water pump is subjected on one side to the water pressure in the pump casing and onthe other to atmospheric pressure. The difference between the two pressures is small and leaka e along the shaft is easily controlled. T e combined air and water pump also has the advantage that the impeller members are readily'balanced against axial thrusts hecauscthe oppositely located inner faces of the impellers 3 and 4-are subjected to substantially the same pressure, while the outer face of the impeller 3 is subjected to the pressure of the water of condensation discharged hy said impeller and the outer face of the impeller 4 is exposed to the pressure of the throwing water. Thus an equalization of the pressures tending to shift the shaft 5 and the impellers carried thereby axially is easily seured by regulating the pressure of the throwing water. Obviously, multistage pumps could be substituted for the single stage pumps illustrated, if dep t ntstatutes, I" -li-a ve" described the rim per ation of my invention, together with; the apparatus which I now consider to representthe best embodiment thereof but- "lfggjlesire to haveit understood that the apparatusshown His only illustrative, and that theinvention can'be'carried out by other means,

What -I claim as new and desire tosecure -by-"Letters Patent of the United States,

v combirie'd condensation and air pump comprising a .caslng, a shaft, a

'throwin'g waterimpeller forthe air pump .inourited jon the shaft, an impeller for the condensation puinp' mounted on the shaft "",.;to.,, their respective impellers, an outlet conin-spaced relation to the" first impeller,

means'for supplying air and water of condensation tocthe region between the imfp'ellers fromwhichregion said fluids pass fduit for the throwing water and air, ade-- livery conduit leadingfromthe outer side of.- the condensationpump impeller, and a 25 outer-side or the air pumpimpeller.

conduit: sup lying .thro'wing water to the :2. A combined condensation and airpump "comprising a casing, a shaft, a throwing ,vi 'a'te'r impeller for the airpump'mou'nted on ,the shaft, an impeller for the condense,

'tio'iif. pump-i mounted ,on the shaft, a [central 1y o al-ranged chamber located between the impellers and communic'ation with the; iliijl'etlof.thelcondeiisatipn pump impeller, means for supplying water of }.condensationtoj'saidchamber, a second. chamber outside the first and in c.ommunication.with. the dthrowing' air pump, means for supplying air to the second chamber, an outlet conduit for the throwing water andni'r, a deliverycon- 'duit leading from the: uterside of the coneompri'sing' a casing, a shaft, fa throwin leading densationpump inrpeller, and a conduit supplying-throwing watei to the outerfjside 4 ,densation pump impeIl'efl-iand aiflconduit supplying throwing water toithe of the air pump. impeller,v

3. ,A combmed-condensati'on'and airpump water impellerafor the air pump mounte on the shaft, an im eller for the condensaftion pum mounte on the shaft, an inlet conduit or the casing which receives air and water-of-condensation from a'condenser,.

a chamber arranged around the shaft between the impellers and in' communication with the inlet o'f the condensation pump impeller,

-'means 01:- su'pplyingw'ater of condensation fromsaid conduit hi-the chamber, a second chamber outside the first and incommuni. cation' with the throwing air pump, means for supplying air from said conduit to the second, chamber, an outlet conduit "for the throwmgrwater and air, a delivery conduit fromethe outer side of the conof the Iairipumpi iim n v on ,the

t er side 4. combined condensation and airpump.

comprising a casing, a throwing air pump" arranged atone side of the casing, a con-i densation: pump airahged at the opposite side of the casing, a shaft on which the 1mpellers of the pumpsare' mounted, there being a gap between the air pump impeller and its surrounding. directing member, em

' inlet conduit on the upper portion of the casing that receives air and water of condensation from a condenser, a chamber arranged around the shaft betweenthe impellers and in communication with the ,inlet of the con:

densation pu'r'np, a conduit for conveying water of condensation from the inlet conside the first and in communication with the gap of'the air pump, a conduit for con- "80 duit to said chamber, a second chamber outveying airfrom the inlet conduit to the second chamber, means in said inlet conduit "for separating the water of condensation om ,the air and dire'ctingthem to their respective" conduits an outlet .cond'ui-t'ri for the throwing water: and air, a deliverypone duitleading from the condensation pump, and a conduit supplying throwing watento 5. Acombin'e'dcondensationiand air pump comprising awcasing, a; shaft-,a throwing waterflimpeller-iffor .the air-pump inted f fl r t g b which. said impeller rotates gapv be'tyve'en the impel-lerqaii said er,

animpellerffortthe Coon en mountedxon the sha 'ft, an the upper portion .oflth ceives air' and water jet a condenser, a chamber ar rangedaround the shaftv between the impellers landfin comf. I

munication with theinletofthe condense tion pump impeller, a conduit leadingfrom the inlet conduit to the chamber and con ."veying water of"condensation to',it,';a ;sec-

ond chamber surroundingthe first andiyin 'eommunication with the gap of tl1ethrowing air pump, ,a conduit leading from, said inlet co11duit. to- ";.the: second chamber and conve'ying air,=.toit,' Ia dam in the inlet con-' the shaft, a directing member within which the impeller rotates,- there being a gap be- 115 an outlet conduit tween the impellerandeaid memberyan impeller for the condensation pump mounted on the shaft, air-inlet conduit on the lipper portion of the casing whi'ch reeeiizes and region between the box for the projecting portion of the shaft,

' outer side of the air pump impeller,

ing water to the outer side 0 .having water of condensation from a condenser, a chamber arranged around the shaft between the impellers and in communication with the inlet of the condensation pump impeller, a second chamber surrounding the first and in communication with the gap of the throwing air pump, a dam extending upwardly from the lower portion of said inlet conduit which forms between it and one wall of the inlet conduit a passage leading from the upper region of said inlet conduit to the second chamber, a conduit leading from the lower region of said inlet conduitbetween the dam and the other wall of said inlet conduit to the first chamber, an outlet conduit for the throwing Water and air, a delivery conduit leading from the outer side of the condensation pump, and a conduit su plying throwf the air pump.

7. A combined condensation and air pump comprising a casing, a condensation pump arranged at one side of the casing, a throwing air pump arranged at the other side of the casing, a shaft on which the impellers of the two pumps are mounted, said shaft the impeller of the air pump mounted on the end thereof within the casing and projecting outward through the portion of the casing inclosing the condensation pump impeller, means for supplying air and water of condensation at the same pressure to the two impellers, a stuffing an outlet conduit in the casing for the throwing water and air, an axially arranged conduit for supplying throwing water to she an a discharge conduit for the water of condensation leading from the outer side of the condensation pump impeller;

8. A combined condensation and air pump comprising a casing, a condensation ump arranged at one side of the casing, a t rowing air pump arranged at the other side of the casing, a shaft on which the impellers of the two pumps are mounted, means for supplying air and water of condensation from a condenser to the region between the two impellers so that the inner faces of said impellers are exposed to the same ressure,

an outlet for the air and water rom the throwing pump, a delivery conduitvleading from the outer side of the condensation pump so. that the external face of its impeller is subjected to the pressune of the outand a conduitv for sup lying throwing water to the outer side of t e air pump so that the external face of its impeller is subjected to the pressure of the throwin water and the thrusts on the shaft due to the pressures on the impellers can be balanced by varying the pressure of the throwing water.

9. The combination with a centrifugal air pump, of a rotary water pump, and a common conduit means for supplying air to the air pump and water to the water pump. 0

10. The combination with a centrifugal air pump, of a centrifugal water pump, and a common. conduit-means for supplying air and water of condensation to the air and water pumps res )ectively, said means in.- cluding a device or separating the air and water and delivering each to its pump.

11. The combination with a conduit couveying air and water of condensation, of an air pump having an inlet communicating with the upper part of said conduit, and a water pump having an inlet communicating with the lower part thereof.

12. The combination with a conduit conyeying air and water of condensation, of a centrifugal air pump having an inlet communicatlng with the upper part of said conduit, and a rotary water pump having an inlet communicating with the lower part thereof.

13. The combination with a conduit conv'eying air and water of condensation and serving to separate the air and water so that the air flows through the upper portion of the conduit and the water through the lower portion, of a throwing-water air pump, a}

centrifugal water pump, a shaft that is come mon to the two pumps, means conveyingair from' gthe upper portion of said conduit to the airpump, and

the water pump.

14. The combination with a conduit; couveying air and water of condensation and serving to separate the air and water so that means conveying water from the lower portion of said conduit to the air flows through the upper portion of j the conduit and the water throughthe lower portion, of a throwing-water air pump, a centrifugal water pump, a shaft that is 'common to the two pumps, means conveying air from the upper portion of the conduit to the inner side of the air pump impeller, means conveying water from the lower portion of the conduit to the inner'side of the water pump impeller, a conduit supplying throwing waterto the outer side of the air pump impeller, and a conduit conveying the.;,1i scharge away from the outer side of the e1ler. ereof, I- have hereunto set WALTER Krnsna.

water pump im In witness w my hand.

Witnesses O'r'ro Gnowmc, FRIEDRICH Sass. 

